公开(公告)号：US07280470B2

公开(公告)日：2007-10-09

申请号：US10654222

申请日：2003-09-03

申请人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

发明人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

IPC分类号： H04J3/04 ,  H04J14/00 ,  G01R31/08 ,  G02F1/00 ,  H04B10/08

CPC分类号： H04J14/0283 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0295 ,  H04J14/0297

摘要： Multiple working paths are established on each working rings and multiple protection paths are established on each of multiple protection rings. A working path on a first working ring spans across first and second nodes for signal transmission in a first direction of the ring, and a working path on a second working ring spans across the first and second nodes for signal transmission in a second, opposite direction of the ring. A protection path on a first protection ring spans across the first and second nodes for signal transmission in said second direction, and a protection path on a second protection ring spans across the first and second nodes for signal transmission in said first direction. The first and second nodes normally use the working paths, respectively. When one of the working paths fails, the first and second nodes use a corresponding protection path.

摘要翻译： 在每个工作环上建立多个工作路径，并在多个保护环中的每一个上建立多个保护路径。 第一工作环上的工作路径横跨第一和第二节点，用于在环的第一方向上进行信号传输，并且第二工作环上的工作路径跨越第一和第二节点跨过第二和相反方向进行信号传输 的戒指 第一保护环上的保护路径穿过第一和第二节点，用于在所述第二方向上进行信号传输，并且第二保护环上的保护路径横跨第一和第二节点跨过所述第一方向进行信号传输。 第一和第二节点通常分别使用工作路径。 当其中一个工作路径发生故障时，第一个和第二个节点使用相应的保护路径。

公开(公告)号：US06657952B1

公开(公告)日：2003-12-02

申请号：US09200583

申请日：1998-11-27

申请人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

发明人： Tatsuya Shiragaki ,  Naoya Henmi ,  Makoto Nishio ,  Hitoshi Takeshita ,  Hirofumi Shimomura

IPC分类号： G01R3108

CPC分类号： H04J14/0283 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0295 ,  H04J14/0297

摘要： In a ring topology network, a number of nodes interconnect transmission links to form first and second working rings and first and second optical protection rings in a ring topology. Multiple working paths are established on each working ring and multiple protection paths are established on each protection ring corresponding to the working paths. A first working path spans across first and second nodes for transmission of a signal in a first direction of the ring topology, and a second working path of the second working rings spans across the first and second nodes for transmission of a signal in a second direction of the ring topology opposite to the first direction. A first protection path on the first protection ring spans across the first and second nodes for transmission of a signal in the second direction of the ring topology, and a second protection path of the second protection ring spans across the first and second nodes for transmission of a signal in the first direction of the ring topology. The first and second nodes normally use the first and second working paths, respectively. Responsive to a failure of one of the first and second working paths, the first and second nodes use a corresponding one of the first and second protection paths, instead of the failed working path.

摘要翻译： 在环形拓扑网络中，多个节点互连传输链路以形成环形拓扑中的第一和第二工作环以及第一和第二光学保护环。 在每个工作环上建立多个工作路径，并在与工作路径对应的每个保护环上建立多条保护路径。 第一工作路径横跨第一和第二节点，用于在环形拓扑的第一方向传输信号，并且第二工作环的第二工作路径横跨第一和第二节点跨过第二方向传输信号 的环形拓扑与第一个方向相反。 第一保护环上的第一保护路径穿过第一和第二节点，用于在环形拓扑的第二方向上传输信号，并且第二保护环的第二保护路径跨过第一和第二节点传输 环形拓扑的第一个方向的信号。 第一和第二节点通常分别使用第一和第二工作路径。 响应于第一和第二工作路径之一的故障，第一和第二节点使用第一和第二保护路径中的对应的一个，而不是故障工作路径。

公开(公告)号：US06407834B1

公开(公告)日：2002-06-18

申请号：US09153217

申请日：1998-09-14

申请人： Hitoshi Takeshita ,  Naoya Henmi

发明人： Hitoshi Takeshita ,  Naoya Henmi

IPC分类号： H04B1008

CPC分类号： H04J14/0295 ,  H04J14/0201 ,  H04J14/0227 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0286

摘要： Optical regenerative relay amplifier 102 has a function for monitoring the power of optical signals from an optical fiber 101, and issuing an optical signal trouble detection signal (AIS (Alarm Indication Signal)) for shutting down the optical power in case that optical signal inputs are lost, and notifying the trouble, and optical ADMs 103 have a wavelength path selecting function, a wavelength path bundle function, and a wavelength path trouble or quality monitoring function in addition to an AIS issue function, and the optical cross-connect systems 104 have an AIS issue function, a function for monitoring a trouble or quality deterioration of optical signals for every wavelength path, a wavelength path grooming function, and a wavelength path protection function, and the terminal stations 105 transmit and receive services by optical signals having predetermined wavelengths, and monitoring a trouble or quality deterioration of optical signals for every wavelength path is conducted without depending on signal speed and format.

摘要翻译： 光学再生继电器放大器102具有用于监视来自光纤101的光信号的功率的功能，并且发出光信号故障检测信号（AIS（报警指示信号）），用于在光信号输入为 丢失并通知故障，除了AIS发布功能之外，光ADM103具有波长路径选择功能，波长路径束功能，波长路径故障或质量监视功能，并且光交叉连接系统104具有 AIS发布功能，用于监视每个波长路径的光信号的故障或质量恶化的功能，波长路径梳理功能和波长路径保护功能，并且终端105通过具有预定波长的光信号来发送和接收业务 并且对于每个波长路径监视光信号的故障或质量恶化进行 根据信号速度和格式。

公开(公告)号：US06271949B1

公开(公告)日：2001-08-07

申请号：US08991049

申请日：1997-12-16

申请人： Yoshihiko Suemura ,  Naoya Henmi

发明人： Yoshihiko Suemura ,  Naoya Henmi

IPC分类号： H04J1402

CPC分类号： H04Q11/0005 ,  H04J14/02 ,  H04Q2011/0015 ,  H04Q2011/0022 ,  H04Q2011/0032 ,  H04Q2011/0075 ,  H04Q2011/0086

摘要： An optical wavelength selector is provided that selects WDM channels from WDM optical signal and outputs each WDM channels from a plurality of ports. WDM optical signal in which m×n WDM channels are multiplexed is divided into n WDM channel groups and outputted by means of one wavelength-division demultiplexer. One WDM channel group is selected from the n WDM channel groups by means of n optical gate switches. The selected WDM optical signal is then separated into m WDM channels by wavelength and outputted by means of an optical wavelength router. As a result, m WDM channels of a specific WDM channel group can be received by m optical receivers.

摘要翻译： 提供一种光波长选择器，其从WDM光信号中选择WDM信道，并从多个端口输出每个WDM信道。 其中m×n个WDM信道被多路复用的WDM光信号被分成n个WDM信道组，并通过一个波分解多路复用器输出。 通过n个光栅开关从n个WDM信道组中选择一个WDM信道组。 所选择的WDM光信号经波长分离为m个WDM信道，并通过光波长路由器输出。 结果，m个光接收机可以接收特定WDM信道组的m个WDM信道。

公开(公告)号：US5392303A

公开(公告)日：1995-02-21

申请号：US220223

申请日：1994-03-30

申请人： Takahiro Shiozawa ,  Masayuki Yamaguchi ,  Naoya Henmi

发明人： Takahiro Shiozawa ,  Masayuki Yamaguchi ,  Naoya Henmi

IPC分类号： H01S5/024 ,  H01S5/068 ,  H01S5/0687 ,  H01S3/13

CPC分类号： H01S5/06808 ,  H01S5/024 ,  H01S5/02415 ,  H01S5/06804 ,  H01S5/0687

摘要： A frequency stabilization method of a semiconductor laser is provided. A driving current, a forward voltage and an output light power of the laser mounted on a heat sink is detected. A temperature of the heat sink is also detected. A consumption power of the laser is obtained from the driving current and voltage thus detected, providing a relationship between the output light power and the consumption power. The driving current is controlled so that the output light power is kept constant, and the temperature of the heat sink is controlled based on the relationship so that a temperature of an active layer of the laser is maintained. The output light power is kept constant and at the same time, any temperature change of the active layer is cancelled through the temperature control of the heat sink. Even if the consumption power changes due to an leakage current and/or a recombination current without luminescence to maintain the output light power during long time operation, the temperature of the active layer is maintained by cancelling the consumption power change through the temperature control of the heat sink. Thus, the oscillation frequency of the semiconductor laser can be stabilized at a given value.

摘要翻译： 提供半导体激光器的频率稳定方法。 检测安装在散热器上的激光器的驱动电流，正向电压和输出光功率。 还检测散热器的温度。 从所检测的驱动电流和电压获得激光的消耗功率，提供输出光功率与消耗功率之间的关系。 控制驱动电流，使得输出光功率保持恒定，并且基于保持激光器的有源层的温度的关系来控制散热器的温度。 输出光功率保持恒定，同时通过散热器的温度控制来消除有源层的任何温度变化。 即使消耗功率由于泄漏电流而变化，和/或没有发光的复合电流在长时间运行期间保持输出光功率，有源层的温度通过消除功率变化来维持 散热器。 因此，半导体激光器的振荡频率可以稳定在给定值。

公开(公告)号：US5325225A

公开(公告)日：1994-06-28

申请号：US851

申请日：1993-01-06

申请人： Tetsuyuki Suzaki ,  Naoya Henmi

发明人： Tetsuyuki Suzaki ,  Naoya Henmi

IPC分类号： H04B10/61 ,  H01S5/068 ,  H04B10/2513 ,  H04B10/293 ,  H04B10/516 ,  H04B10/54 ,  H04B10/556 ,  H04B10/564 ,  H04B10/572 ,  H04B10/04

CPC分类号： H04B10/504 ,  H04B10/505

摘要： A method of optical transmission comprises steps of generating a light signal, controlling a wavelength of the light signal in accordance with a correcting signal, and modulating an intensity of the light signal supplied from the light source to generate an output light signal in accordance with a modulating signal. The wavelength change of the light signal generated by the light source coincides with the wavelength change which occurs during the modulating step, so that the wavelength change is cancelled in the output light signal. An optical transmitter used in the method comprises a light source which generates a light signal, a correcting signal generating circuit which supplies the light source with a correcting signal for changing the wavelength of the light signal generated by the light source, and an optical modulator which modulates an intensity of the light signal supplied from the light source to generate an output light signal in accordance with a modulating signal.

摘要翻译： 一种光传输方法包括以下步骤：产生光信号，根据校正信号控制光信号的波长，以及调制从光源提供的光信号的强度，以产生根据光信号的输出光信号 调制信号。 由光源产生的光信号的波长变化与在调制步骤期间发生的波长变化一致，从而在输出光信号中消除波长变化。 在该方法中使用的光发送器包括产生光信号的光源，向光源提供用于改变由光源产生的光信号的波长的校正信号的校正信号发生电路，以及光调制器， 调制从光源提供的光信号的强度，以根据调制信号产生输出光信号。

公开(公告)号：US5227908A

公开(公告)日：1993-07-13

申请号：US729754

申请日：1991-07-15

申请人： Naoya Henmi

发明人： Naoya Henmi

IPC分类号： H04B10/2513 ,  H04B10/50 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548 ,  H04L27/04 ,  H04L27/06

CPC分类号： H04L27/06 ,  H04B10/25137 ,  H04B10/505 ,  H04B10/5165 ,  H04B10/54 ,  H04B10/548 ,  H04L27/04

摘要： A transmitter unit (100) including a semiconductor laser (101) as a carrier light exciting source, a biasing source (102) for providing the semiconductor laser with a d.c. biasing current, an external modulator (105) for intensity-modulating an output light of the semiconductor laser according to a transmission signal, and means (107; 210; 510; 701, 702, 703, 704) for causing the external modulator to output only the carrier light and either side-band light. Also provided is a receiver unit (150) including a receiver (151) for square-law detecting the carrier light and the side-band light supplied from the transmitter unit to obtain an electric signal, and a linear filter (152) for equalizing this electric signal. The present invention results in an optical communication apparatus capable of easily equalizing dispersion distortion caused in a transmission path (115) having a large dispersion from a light-intensity modulated light signal transmitted therethrough.

公开(公告)号：US20060193325A1

公开(公告)日：2006-08-31

申请号：US11414415

申请日：2006-05-01

申请人： Kazuo Takagi ,  Naoya Henmi ,  Shinobu Sasaki ,  Kurenai Murakami ,  Motoo Nishihara ,  Yoshinori Rokugou

发明人： Kazuo Takagi ,  Naoya Henmi ,  Shinobu Sasaki ,  Kurenai Murakami ,  Motoo Nishihara ,  Yoshinori Rokugou

IPC分类号： H04L12/28

CPC分类号： H04L1/0061 ,  H04L1/0072 ,  H04L1/0079 ,  H04L1/0085

摘要： A storage circuit defines a first field for storing first header bits of a first payload signal of a first data unit, a second field, and a third field for storing the first payload signal. The first header bits are equal in number to second header bits of a second payload signal of a second data unit. A division circuit divides the first header bits by a generator polynomial to produce a first error check code. The same generator polynomial is used to divide the second header bits to produce a second error check code. A remainder of division of hypothetical header bits by the generator polynomial is summed to the first error check code to produce a sum which is inserted into the second field of the storage circuit. The hypothetical header bits are greater in number than a total number of bits in the first and second fields, so that the first and second data units can be distinguished from each other by different error check results of the first and second data units.

公开(公告)号：US06771907B1

公开(公告)日：2004-08-03

申请号：US09576240

申请日：2000-05-24

申请人： Yuuki Yoshifuji ,  Shuichi Iida ,  Takashi Yamazaki ,  Youko Nakabayashi ,  Shinya Nakamura ,  Kimio Ozawa ,  Naoki Ando ,  Hitoshi Kikuchi ,  Tukasa Haga ,  Hiromitu Watanabe ,  Minoru Shinta ,  Hitoshi Takeshita ,  Shinobu Sasaki ,  Ryou Yamada ,  Naoya Henmi

发明人： Yuuki Yoshifuji ,  Shuichi Iida ,  Takashi Yamazaki ,  Youko Nakabayashi ,  Shinya Nakamura ,  Kimio Ozawa ,  Naoki Ando ,  Hitoshi Kikuchi ,  Tukasa Haga ,  Hiromitu Watanabe ,  Minoru Shinta ,  Hitoshi Takeshita ,  Shinobu Sasaki ,  Ryou Yamada ,  Naoya Henmi

IPC分类号： H04J1400

CPC分类号： H04J14/0295 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283

摘要： An optical ring system having: a wavelength demultiplexer to which wavelength-multiplexed optical signal to be sent through an optical fiber from a previous node of multiple nodes is input and in which optical signal with each wavelength assigned to itself is demultiplexed; an optical ring device which is disposed in a predetermined node of the multiple nodes to the each wavelength assigned and which is composed of a failure existence judging part which terminates an overhead of each optical signal with a wavelength demultiplexed by the wavelength demultiplexer and judges whether a failure occurs in regard to a wavelength in a previous section through which optical signal with the assigned wavelength is sent, and a switching part which, when the failure existence judging means determines the occurrence of failure, selects a path that allows optical signal with the wavelength to be transmitted to the previous node while avoiding the previous section incurring the failure; and a wavelength multiplexer which multiplexes optical signal to be output from the optical ring part and then outputs it to an optical fiber connected to a next node.

摘要翻译： 一种光环系统，具有波长解复用器，通过来自多个节点的先前节点的光纤输入波分复用光信号，其中分配有每个波长的光信号被解复用; 光环设备，被布置在多个节点的预定节点到分配的每个波长，并且由故障存在判断部分组成，故障存在判断部分终止由波长解复用器解复用的波长的每个光信号的开销，并判断是否 关于发送了具有指定波长的光信号的先前部分中的波长发生故障，以及当故障存在判断装置确定故障发生时，选择允许具有波长的光信号的路径的切换部分 被发送到上一个节点，同时避免前一个部分发生故障; 以及多路复用从光环部分输出的光信号，然后将其输出到连接到下一个节点的光纤。

公开(公告)号：US06441935B1

公开(公告)日：2002-08-27

申请号：US09210277

申请日：1998-12-11

申请人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

发明人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

IPC分类号： H04J1408

CPC分类号： H04Q11/0001 ,  H04L49/25 ,  H04L49/30 ,  H04L49/50 ,  H04Q2011/0024 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/005

摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.